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am335x irq handling improvement

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This patch makes the following changes to the Beaglebone IRQ handling code:

- Disable support for nested interrupts.
- Detect spurious IRQs using the SPURIOUSIRQ field of the INTC_SIR_IRQ register.
- Acknowledge spurious IRQs by setting the NewIRQAgr bit of the INTC_CONTROL
  register. This cleans the SPURIOUSIRQ field and allows new interrupts
  to be generated.
- Improve the get_mir_reg function a bit.

Closes #2580.
This commit is contained in:
Martin Galvan
2016-02-28 00:19:33 +01:00
committed by Ben Gras
parent 67de5082a2
commit 8c5c53f478
2 changed files with 42 additions and 39 deletions
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3
c/src/lib/libcpu/arm/shared/include/omap3.h
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@@ -72,7 +72,8 @@
#define OMAP3_INTR_ILR(base,m) \
(base + OMAP3_INTCPS_ILR0 + 0x4 * (m))
#define OMAP3_INTR_ACTIVEIRQ_MASK 0x7f /* Active IRQ mask for SIR_IRQ */
#define OMAP3_INTR_SPURIOUSIRQ_MASK (0x1FFFFFF << 7) /* Spurious IRQ mask for SIR_IRQ */
#define OMAP3_INTR_ACTIVEIRQ_MASK 0x7F /* Active IRQ mask for SIR_IRQ */
#define OMAP3_INTR_NEWIRQAGR 0x1 /* New IRQ Generation */
#define OMAP3_DM337X_NR_IRQ_VECTORS 96